package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Slf4j
@Service
public class OrderServiceImpl implements OrderService {

    @Autowired
    private OrderMapper orderMapper;

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;

    @Autowired
    private AddressBookMapper addressBookMapper;

    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WebSocketServer websocketServer;


    @Transactional
    @Override
    public OrderSubmitVO submit(OrdersSubmitDTO ordersSubmitDTO) {
        // 1.查看当前地址和购物车是否为空
        Long addressBookId = ordersSubmitDTO.getAddressBookId();
        AddressBook addressBook = addressBookMapper.getById(addressBookId);
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        ShoppingCart cart = new ShoppingCart();
        cart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(cart);
        if (shoppingCartList == null) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        // 2.往订单表中插入数据
        Orders orders = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, orders);

        orders.setNumber(String.valueOf(System.currentTimeMillis()));
        orders.setOrderTime(LocalDateTime.now());
        orders.setPayStatus(Orders.UN_PAID);
        orders.setStatus(Orders.PENDING_PAYMENT);
        orders.setPhone(addressBook.getPhone());
        orders.setConsignee(addressBook.getConsignee());
        orders.setUserId(BaseContext.getCurrentId());
        orders.setAddress(addressBook.getDetail());
        orders.setRemark(ordersSubmitDTO.getRemark());

        orderMapper.insert(orders);

        Long orderId = orders.getId();

        //往订单明细表中插入数据
        List<OrderDetail> orderDetailList = shoppingCartList.stream().map(item -> {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(item, orderDetail);
            orderDetail.setOrderId(orderId);
            return orderDetail;
        }).collect(Collectors.toList());

        orderDetailMapper.addBatch(orderDetailList);

        //删除当前用户的购物车数据
        shoppingCartMapper.delete(cart);

        //返回VO
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(orderId)
                .orderNumber(orders.getNumber())
                .orderTime(orders.getOrderTime())
                .orderAmount(orders.getAmount())
                .build();
        return orderSubmitVO;
    }

    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    public void payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        /*// 当前登录用户id
        Long userId = BaseContext.getCurrentId();
        User user = userMapper.getById(userId);

        //调用微信支付接口，生成预支付交易单
        JSONObject jsonObject = weChatPayUtil.pay(
                ordersPaymentDTO.getOrderNumber(), //商户订单号
                new BigDecimal(0.01), //支付金额，单位 元
                "苍穹外卖订单", //商品描述
                user.getOpenid() //微信用户的openid
        );

        if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {
            throw new OrderBusinessException("该订单已支付");
        }

        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        vo.setPackageStr(jsonObject.getString("package"));

        return vo;*/
        paySuccess(ordersPaymentDTO.getOrderNumber());

    }

    /**
     * 支付成功，修改订单状态
     *
     * @param outTradeNo
     */
    public void paySuccess(String outTradeNo) {

        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);

        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();

        orderMapper.update(orders);

        //使用websocket推送消息给客户端
        Map map=new HashMap();
        map.put("type",1);//1代表来单提醒  2代表客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","来单提醒");
        String jsonString = JSON.toJSONString(map);

        websocketServer.sendToAllClient(jsonString);

    }

    @Override
    public PageResult page(OrdersPageQueryDTO ordersPageQueryDTO) {
        //最后返回OrderVO
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.page(ordersPageQueryDTO);
        List<OrderVO> orderVOList = page.getResult().stream().map(item -> {
            OrderVO orderVO = new OrderVO();
            BeanUtils.copyProperties(item, orderVO);
            List<OrderDetail> orderDetail = orderDetailMapper.getByOrderId(item.getId());
            //将orderDetail集合转换成String字符串
            String str = orderDetail.stream().map(x -> x.getName() + "*" + x.getNumber()
            ).collect(Collectors.joining(","));

            orderVO.setOrderDishes(str);
            orderVO.setOrderDetailList(orderDetail);
            return orderVO;

        }).collect(Collectors.toList());
        long total = page.getTotal();
        return new PageResult(total, orderVOList);
    }

    @Override
    public OrderStatisticsVO statistics() {
        //待接单的个数
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        //待派送数量
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        //派送中数量
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);


        OrderStatisticsVO osv = new OrderStatisticsVO();
        osv.setToBeConfirmed(toBeConfirmed);
        osv.setConfirmed(confirmed);
        osv.setDeliveryInProgress(deliveryInProgress);
        return osv;
    }

    @Override
    public OrderVO details(Long id) {
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        String str = orderDetailList.stream().map(item -> {
            return item.getName() + "*" + item.getNumber();
        }).collect(Collectors.joining(","));
        orderVO.setOrderDishes(str);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }

    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) {
        //查询是否有当前订单
        Orders currentOrder = orderMapper.getById(ordersRejectionDTO.getId());
        if (currentOrder == null || !currentOrder.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        //查询当前订单是否付款
        if (currentOrder.getPayStatus().equals(Orders.PAID)) {
            log.info("订单Id为{}申请退款，退款金额为{}", ordersRejectionDTO.getId(), currentOrder.getAmount());
        }
        Orders orders = Orders.builder()
                .id(ordersRejectionDTO.getId())
                .rejectionReason(ordersRejectionDTO.getRejectionReason())
                .status(Orders.CANCELLED)
                .cancelTime(LocalDateTime.now())
                .payStatus(Orders.REFUND)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void delivery(Long id) {
        Orders order = orderMapper.getById(id);
        if (order == null || !order.getStatus().equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Orders orders = Orders.builder()
                .id(id)
                .deliveryStatus(Orders.DELIVERY_IN_PROGRESS)
                .estimatedDeliveryTime(LocalDateTime.now().plusMinutes(15))
                .status(Orders.DELIVERY_IN_PROGRESS)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        Orders byId = orderMapper.getById(ordersCancelDTO.getId());
        if (byId.getPayStatus().equals(Orders.PAID)) {
            log.info("拒绝订单号为{}的订单，需退款{}元", ordersCancelDTO.getId(), byId.getAmount());
        }
        Orders orders = Orders.builder()
                .id(ordersCancelDTO.getId())
                .cancelReason(ordersCancelDTO.getCancelReason())
                .status(Orders.CANCELLED)
                .cancelTime(LocalDateTime.now())
                .payStatus(Orders.REFUND)
                .build();
        orderMapper.update(orders);
    }

    @Override
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());

        orderMapper.update(orders);
    }
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(pageNum, pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);

        // 分页条件查询
        Page<Orders> page = orderMapper.page(ordersPageQueryDTO);

        List<OrderVO> list = new ArrayList();

        // 查询出订单明细，并封装入OrderVO进行响应
        if (page != null && page.getTotal() > 0) {
            for (Orders orders : page) {
                Long orderId = orders.getId();// 订单id

                // 查询订单明细
                List<OrderDetail> orderDetails = orderDetailMapper.getByOrderId(orderId);

                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetails);

                list.add(orderVO);
            }
        }
        return new PageResult(page.getTotal(), list);
    }

    @Override
    public void userCancelById(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }

        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }

        Orders orders = new Orders();
        orders.setId(ordersDB.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            //调用微信支付退款接口
            log.info("进行支付退款操作，订单号：{}", ordersDB.getNumber());

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }

        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);

    }
    /**
     * 再来一单
     *
     * @param id
     */
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();

        // 根据订单id查询当前订单详情
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);

        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();

            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());

            return shoppingCart;
        }).collect(Collectors.toList());

        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
    }

    @Override
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);

        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //使用websocket推送消息给客户端
        Map map=new HashMap();
        map.put("type",2);//1代表来单提醒  2代表客户催单
        map.put("orderId",ordersDB.getId());
        map.put("content","客户催单");
        String jsonString = JSON.toJSONString(map);

        websocketServer.sendToAllClient(jsonString);

    }

}
